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AHS 2 > Muscles Of Canine Forelimb > Flashcards

Muscles Of Canine Forelimb Flashcards

1
Q

What is the synsarcosis?

A

Muscular sling supporting torso between forelimbs

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2
Q

Role of extrinsic muscles

A

Attach forelimb to the body

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3
Q

What are intrinsic muscles?

A

Muscles with origin and insertion within the limb

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4
Q

Role of synsarcosis in locomotion

A

Allows craniocaudal translation across the thorax
Spinal extension
Increases stride length

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5
Q

Name extrinsic muscles of the forelimb

A 
Trapezius
Omotransversarius
Brachiocephalicus
Latissimus dorsi
Pectorals
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6
Q

Name deep extrinsic muscles of the forelimb

A

Rhomboideus

Serrated ventralis

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7
Q

What role does the glenohumeral joint have?

A

Flexion and extension

Very little adduction or abduction

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8
Q

Describe the canine glenohumeral joint

A

Joint capsule supported by lateral and medial glenohumeral ligaments

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9
Q

What ligaments are present in the glenohumeral joint?

A

Lateral glenohumeral ligament

Median glenohumeral ligament

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10
Q

Where is the canine glenohumeral joint?

A

Shoulder joint

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11
Q

What is the normal abduction angle of the glenohumeral joint?

A

25-30 degrees

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12
Q

What angle can a medial glenohumeral ligament tear lead to?

A

Around 70 degrees

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13
Q

Which glenohumeral ligament is larger?

A

Medial

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14
Q

What glenohumeral joint is Y shaped?

A

Medial

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15
Q

What provides significant support to the glenohumeral joint?

A

Muscles

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16
Q

What shape is the lateral glenohumeral ligament?

A

Small narrow strip

17
Q

Role of cranial intrinsic muscles acting on the glenohumeral joint

A

Extensors

18
Q

Role of caudal intrinsic muscles acting on the glenohumeral joint

A

Flexors

19
Q

Role of lateral and medial intrinsic muscles acting on the glenohumeral joint

A

Support

20
Q

Muscles of broad scapular origin providing lateral support to the glenohumeral joint

A

Supraspinatus

Infraspinatus

21
Q

Innervation to supraspinatus and infraspinatus

A

Suprascapular nerve

22
Q

Muscles of broad scapular origin that provide medial support to the glenohumeral joint

A 
Subscapularis
Coracobrachialis (functionally insignificant)
23
Q

Innervation to subscapularis

A

Subscapular nerve

24
Q

Name the two shoulder flexors

A

Deltoideus

Teres major

25
Q

Which shoulder flexor muscle can be seen laterally?

A

Deltoideus

26
Q

Which shoulder flexor can be seen medially?

A

Teres major

27
Q

Innervation to shoulder flexors

A

Axillary nerve

28
Q

Name the shoulder extensors

A

Biceps brachii

Supraspinatus (weak shoulder extensor)

29
Q

Primary action of biceps brachii

A

Elbow flexion

30
Q

Innervation of biceps brachii

A

Musculocutaneous nerve

31
Q

What type of muscle is biceps brachii?

A

Bi-articular

32
Q

What are uni articular joints?

A

Muscles moving a single joint

33
Q

What is a bi-articular muscle?

A

Muscle moving more than one joint

34
Q

What type of joint is the glenohumeral joint?

A

Ball and socket

35
Q

Why does the glenohumeral joint primarily act in flexion and extension?

A

The socket of the joint is relatively shallow

AHS 2 (3 decks)

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